scandium or steel frames

My liked but not loved Gunnar Rockhound (reynolds 853 mains, true temper OX stays) was destroyed but somebody failing to secure their hitch rack correctly. I am now looking to get a new hardtail frame and am torn between steel or scandium.

Specifically I am considering the true temper Kona Explosif versus the scandium Kona Kula Primo. I know according the scandium marketing speak, it is supposed to absorb impacts like steel, but how close to the truth is that.

Also if anybody else can recommend other frames in the sub $750 range, please do.